"Tragedy." . . . . . . . . "Human beings are the only species to have evolved the trait of emotional crying. We even create music, fiction, film, and theatre to encourage crying. Michael Trimble looks at the physiology and evolution of this unique human behaviour, exploring its links with language, consciousness, empathy, and religious practices."@en . "tragedy, evolution, and the brain"@en . "Crying Physiological aspects." . . "Crying." . . . .